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Dirt Bike Discussions By Brand
Husqvarna MX & Off-Road Dirt Bikes
02 Cr125 is fast-revisited
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[QUOTE="marcusgunby, post: 225230, member: 17066"] Honda dont be too quick to dismiss the idea-heres some background info- a piston is used to compress the mixture in the combustion chamber,if the top of the piston is the right height from the guedeon pin holes then it probably can be used in any engine with the same dimension-say 54mm bore(like all the 125s have)and say 25mm from crown to pin hole.Now different pistons have different styles-some have windows in the intake side and some have lightening areas around the pin hole.We can use these different designs to tune the engine to our needs.The std Cr piston has a big window in the back-this give more midrange power-but this is where the CR odesnt need more power-it needs more bottom and top.A piston without the window may give a boost to the bottom by moving the power from the midrange.Also the lightening pockets around the pin area arnt there on the vetex and this will boost crancase compression. Eric Gorr uses 1 piston on all the 144cc conversions no matter what brand it is-KTM/KX/YZ/RM/Older CRs. Ive known a GP kawasaki team to modify the engines to use Cr pistons. Also i beleive a hot set up for some tuners is to use a RM piston in the CR. The thing to be careful is when swapping piston from a domed crown to a flat top-head mods have to be done. Eric gorrs website has alot more info on this-read up and be wise;) [/QUOTE]
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Dirt Bike Discussions By Brand
Husqvarna MX & Off-Road Dirt Bikes
02 Cr125 is fast-revisited
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